The perfect way to tackle troublesome wasps and flies and recycle used cans, is with these Can Wasp Traps. Simply clip the Can Wasp Trap onto an old (clean) can, add a small amount of sugared water as bait, using the funnel at the centre of the trap, and place in areas where wasps and flies are a problem. The Can Wasp Traps are a simple, yet effective solution to a common problem. Pack of 2. Keep out of reach of children.